This quiz works best with JavaScript enabled. Home > Biology > Molecular > Molecular Biology – Quiz 31 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Molecular Biology Quiz 31 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are the subunits of DNA and their function? A) Nucleotides that store information. B) Monosaccharides that provide quick energy for the cell. C) Lipids that store energy and provide insulation. D) Proteins that provide the building blocks for the structural components of organisms. Show Answer Correct Answer: A) Nucleotides that store information. 2. What factor most affects the order of amino acids in a protein? A) The DNA located in the nucleus of the cell. B) The cell in which the protein is located. C) The amount of ATP available for the cell's use. D) The area in a cell where proteins are produced. Show Answer Correct Answer: A) The DNA located in the nucleus of the cell. 3. Protein synthesis is a process that uses DNA, RNA and ribosomes to build proteins, The protein are built from their building blocks. What are the building blocks of proteins called? A) Nucleotides. B) Proteins. C) Amino acids. D) Carbohydrates. Show Answer Correct Answer: C) Amino acids. 4. Which of the following is true about plasmids A) Small circular piece of DNA. B) Small circular piece of RNA. C) Located in bacteria. D) Small circular piece of DNA that is located in bacteria. Show Answer Correct Answer: D) Small circular piece of DNA that is located in bacteria. 5. Which statement best describes the primary function of DNA replication A) The ensure daughter cells have a complete copy of the DNA. B) To prevent mutations from occurring in cells. C) To provide genetic variation within specific organisms. D) To allow prokaryotic cells to undergo meiosis. Show Answer Correct Answer: A) The ensure daughter cells have a complete copy of the DNA. 6. Which enzyme is needed to start DNA replication? A) DNA Polymerase. B) Topoisomerase. C) Ligase. D) Primase. Show Answer Correct Answer: D) Primase. 7. What is the function of a cell's ribosomes? A) To remove wastes. B) To make food. C) To make proteins. D) To release energy. Show Answer Correct Answer: C) To make proteins. 8. A 4 polypeptide globular protein in red blood cells. Binds oxygen in lungs and releases it in tissues. A) Integrin. B) Hemoglobin. C) Lysozyme. D) Rubisco. Show Answer Correct Answer: B) Hemoglobin. 9. Which of the following is the complementary mRNA strand for this strand of DNA? ATT-GCG-AGT A) UAA-CGC-TCA. B) UAA-GCG-UCA. C) UAA-CGC-AGT. D) UAA-CGC-UCA. Show Answer Correct Answer: D) UAA-CGC-UCA. 10. Arrange the steps for transcription in decreasing order. A) Initiation - elongation - termination. B) Initiation - termination - elongation. C) Termination - initiation -elongation. D) Termination - elongation - initiation. Show Answer Correct Answer: D) Termination - elongation - initiation. 11. What mutation has occurred here? T-G-A-C-C-AT-G-A-G-C-A A) Substitution. B) Deletion. C) Insertion. D) Frameshift. Show Answer Correct Answer: A) Substitution. 12. How do cells obtain the energy and materials necessary for the work they do? A) They release nitrogen. B) They take in nutrients. C) They move around in the body. D) They produce oxygen and carbon dioxide. Show Answer Correct Answer: B) They take in nutrients. 13. A base pair substitution can result in all of the following except ..... A) Missense mutation. B) Frameshift Mutation. C) Silent Mutation. D) Nonsense mutation. Show Answer Correct Answer: B) Frameshift Mutation. 14. How many nucleotides are in 5 codons of RNA? A) 5. B) 10. C) 15. D) 20. Show Answer Correct Answer: C) 15. 15. DNA molecule segment is : TTACGCAAG The mutated DNA segment is TTACGCAAC. This is an example of ..... mutation. A) Base Substitution. B) Base Insertion. C) Base Inversion. D) Translocation. Show Answer Correct Answer: A) Base Substitution. 16. Which of the following are connected by hydrogen bonds? A) Hydrogen to oxygen within a molecule of water. B) Phosphate to sugar in a DNA molecule. C) Base to sugar in a DNA molecule. D) Hydrogen to oxygen between two different molecules of water. Show Answer Correct Answer: D) Hydrogen to oxygen between two different molecules of water. 17. In order for DNA instructions to move from the nucleus to the ribosomes in the cytoplasm of a cell, an RNA copy of a DNA strand must be made. This process, which takes place in a cell's nucleus is called..... A) Translation. B) Mutation. C) DNA replication. D) Transcription. Show Answer Correct Answer: D) Transcription. 18. The bonds between water molecules are ..... bonds. A) Covalent. B) Ionic. C) Hydrogen. D) None of above. Show Answer Correct Answer: C) Hydrogen. 19. Anabolic reaction A) The build up of complex molecules from simpler molecules and requires energy. B) The breakdown of bigger molecules to smaller ones and uses energy. C) The build up of small molecules into bigger ones and doesn't require energy. D) The breakdown of complex molecules into more simpler molecules and doesn't require energy. Show Answer Correct Answer: A) The build up of complex molecules from simpler molecules and requires energy. 20. Transcription takes place in the ....., and translation takes place in the ..... A) Ribosome, cytoplasm. B) Nucleus, ribosome. C) Nucleus, Golgi apparatus. D) Cytoplasm, nucleus. Show Answer Correct Answer: B) Nucleus, ribosome. ← PreviousNext →Related QuizzesBiology QuizzesMolecular Biology Quiz 1Molecular Biology Quiz 2Molecular Biology Quiz 3Molecular Biology Quiz 4Molecular Biology Quiz 5Molecular Biology Quiz 6Molecular Biology Quiz 7Molecular Biology Quiz 8Molecular Biology Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books